According to the difference of LCD production types, it is generally classified into TN-LCD, STN-LCD and TFT-LCD. Among them, TN-LCD and ordinary STN-LCD can only realize monochrome display, and STN-LCD upgrade products CSTN-LCD and TNT-LCD can be displayed in color. With the rapid popularization of color display products, TFT-LCD with excellent display performance has become the mainstream product of liquid crystal display, occupying the dominant position of LCD market.
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